L-605™ is a nonmagnetic cobalt-based chromium-tungstennickel alloy that has excellent corrosion and oxidation resistance, and high strength at both room and elevated
temperatures. Through work hardening, high strength levels can be obtained. L-605™ has a minimal heat treatment response, but can be used in the cold worked and aged
condition. Applications include medical implant devices, springs, valves, and engine components for the aerospace industry. As a result of its high tungsten content, L-605TM is radiopaque, which is beneficial for implant devices
Because of the alloy’s high work hardening rate, only minimal reductions can be taken before solution annealing will be required. L-605TM is very resistant to oxidation and scaling at elevated temperatures, and is nonmagnetic in all conditions. L-605™ is produced by vacuum induction melting followed by electroslag remelting (VIM-ESR), and as such, has a low nonmetallic inclusion level.
Available Sizes:
L-605™ is available from Hamilton Precision Metals as strip product. Contact HPM Sales Department for size capability information. The material corresponds to UNS R30605.
Nominal Composition
| L-605™ NOMINAL COMPOSITION |
| Nickel |
10%
|
| Tungsten |
15%
|
| Chromium |
20%
|
| Iron |
3.00% Max
|
| Manganese |
1.5%
|
| Carbon |
0.10%
|
| Silicon |
1.00% Max
|
| Cobalt |
Balance
|
Mechanical Properties
| L-605™ MECHANICAL PROPERTIES |
|
ANNEALED |
| Ultimate Tensile Strength |
165,000 PSI |
| Yield Strength (0.2% Offset) |
85,000 PSI |
| Elongation in 2”+ |
30%
|
| Hardness |
91 HRb
|
| Modulus of Elasticity |
35.3 X 10^
6 PSI
|
+The measured elongation will be less as thickness decreases to 0.003” and less
These values may be adjusted by control of process variables – consult HPM for desired values.
Physical Properties
| L-605™ PHYSICAL PROPERTIES |
| Density |
0.330 lbs/cu.in. |
| Melting Point (Approx.) |
2500°F |
| Electrical Resistivity @ R.T. |
88.7 Microhm·cm |
|
Thermal Expansion Coefficient (RT to 200°C)
|
12.9 PPM/°C
|
| Thermal Conductivity @ R.T. |
12.7 W/m·K
|
Typical values to guide alloy selection but are not a guarantee of minimum or maximum.